Bruce Willis cheers on daughter Scout at New York gig

Bruce Willis and Demi Moore’s singer daughter Scout took to the stage to perform with her band in New York on Monday night.

The former Hollywood couple’s second daughter sang several tracks with her band, Gus + Scout, at the Mercury Lounge in the Big Apple, while dad Bruce and sisters Tallulah and Rumer cheered from the crowd. Her bandmate, Gus Wenner, is the son of Rolling Stone founder Jann Wenner.

James McCartney, son of Paul and Linda McCartney, said he'd like to re-form the Beatles, but with the original musicians' offspring.

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James McCartney, son of Paul and Linda McCartney, said he'd like to re-form the Beatles, but with the original musicians' offspring.

James McCartney, son of Paul and Linda McCartney, said he'd like to...re-form the Beatles, but with the original musicians' offspring.

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Ethan Miller / 2011 Getty Images

Musician Sean Lennon is one of the more famous of the Beatles offspring. He's the son of John Lennon and Yoko Ono.

Image 39 of 60 - Celebrity offspring

Musician Sean Lennon is one of the more famous of the Beatles offspring. He's the son of John Lennon and Yoko Ono.

Musician Sean Lennon is one of the more famous of the Beatles...offspring. He's the son of John Lennon and Yoko Ono.

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Ethan Miller / 2011 Getty Images

Guitarist/drummer/vocalist Dhani Harrison is the son of the late Beatle George Harrison.

Image 40 of 60 - Celebrity offspring

Guitarist/drummer/vocalist Dhani Harrison is the son of the late Beatle George Harrison.

Guitarist/drummer/vocalist Dhani Harrison is the son of the late...Beatle George Harrison.

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English rock drummer Zak Starky is the son of Beatles drummer Ringo Starr and his first wife, Maureen Starkey Tigrett.

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English rock drummer Zak Starky is the son of Beatles drummer Ringo Starr and his first wife, Maureen Starkey Tigrett.

English rock drummer Zak Starky is the son of Beatles drummer Ringo...Starr and his first wife, Maureen Starkey Tigrett.

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And their dads: The Beatles in 1964: John Lennon, George Harrison, Paul McCartney and Ringo Starr, pictured on their arrival in London following a tour of Australia.

Image 42 of 60 - Celebrity offspring

And their dads: The Beatles in 1964: John Lennon, George Harrison, Paul McCartney and Ringo Starr, pictured on their arrival in London following a tour of Australia.

And their dads: The Beatles in 1964: John Lennon, George Harrison,...Paul McCartney and Ringo Starr, pictured on their arrival in London...following a tour of Australia.

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Dimitrios Kambouris / Getty Images

Zoe Kravitz most recently appeared in 2011's "X-Men: First Class," and she fronts the rock band Elevator Fight.

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Zoe Kravitz most recently appeared in 2011's "X-Men: First Class," and she fronts the rock band Elevator Fight.

Zoe Kravitz most recently appeared in 2011's "X-Men: First Class," and...she fronts the rock band Elevator Fight.

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Jason Merritt / Getty Images

Zoe's mom is former "Cosby Show" actress Lisa Bonet.

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Zoe's mom is former "Cosby Show" actress Lisa Bonet.

Zoe's mom is former "Cosby Show" actress Lisa Bonet.

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Ethan Miller / 2012 Getty Images

And Zoe's dad is rocker Lenny Kravitz.

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And Zoe's dad is rocker Lenny Kravitz.

And Zoe's dad is rocker Lenny Kravitz.

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Astrid Stawiarz / Getty Images

Mamie Gummer is an aspiring actress who has roles in "The Good Wife," HBO's "John Adams" and made her Broadway debut in the Tony Award-nominated revival of "Les liaisons dangereuses." She currently stars in the CW's "Emily Owens, M.D."

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Mamie Gummer is an aspiring actress who has roles in "The Good Wife," HBO's "John Adams" and made her Broadway debut in the Tony Award-nominated revival of "Les liaisons dangereuses." She currently stars in the CW's "Emily Owens, M.D."

Mamie Gummer is an aspiring actress who has roles in "The Good Wife,"...HBO's "John Adams" and made her Broadway debut in the Tony...Award-nominated revival of "Les liaisons dangereuses." She currently...stars in the CW's "Emily Owens, M.D."

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Jamie McCarthy / Getty Images

Gummer's parents are Meryl Streep and sculptor Don Gummer.

Image 47 of 60 - Celebrity offspring

Gummer's parents are Meryl Streep and sculptor Don Gummer.

Gummer's parents are Meryl Streep and sculptor Don Gummer.

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Vittorio Zunino Celotto / Getty Images

Modeling hopeful Margaret Qualley made her runway debut at the Philosophy di Alberta Ferretti show during New York Fashion Week show in Sept. 2011.

Image 48 of 60 - Celebrity offspring

Modeling hopeful Margaret Qualley made her runway debut at the Philosophy di Alberta Ferretti show during New York Fashion Week show in Sept. 2011.

Modeling hopeful Margaret Qualley made her runway debut at the...Philosophy di Alberta Ferretti show during New York Fashion Week show...in Sept. 2011.